
15
Iftheunit isused withoutthese parts,it candamage thedevice
and is especially hazardous to the operator’s safety.
5.2 REPLACINGTHETORCHASSEMBLYQ
Open the grip by removing the screws. Remove the screws
holdingtheterminalsofthesafetyconductorsS-S1.Removethe
screwholding theconductorfor thepilot arcUafterfirst cutting
theinsulatingtubeK1.RemovethefittingVafterfirstcuttingthe
insulatingtubeK.Mountthenewtorchassemblybyperforming
the above steps in reverse order.
The fitting Vand conductor Uare insulated by attaching the
heat-shrink tubes Kand K1 directly to the fittings themselves.
Do this by heating the tube with a small heat source (i.e., a
cigarette lighter). Before replacing the grip, make sure that all
connectionshave beenfirmly tightened.
5.3 REPLACINGTHETORCHFITTINGW
Remove the ring-nut Iand cut the clamps holding the cable J.
Unscrew the screw Mand slide the cover Lout backwards.
RemovethecontrolcablepegsXandZandtheredpilotarcwire
pegs Yand Y1. Cut the insulating tube K2 and unscrew the
assembly Nfrom the fitting V1. Mount the new assembly by
performingtheabovestepsinreverseorder.Tolockthethread
of assembly Nonto the fitting V1, use sealing adhesive for
threads. The pegs Xand Zof the control cable must be
connected to contacts 1 and 9 of the assembly N. The pegs Y
and Y1 ofthe redcables forthe pilotarc mustbe connectedto
the contacts 5 and 6 of the assembly N. The tube K2 acts as
insulation, and is attached to the fitting V1 by heating it.
5.4 REPLACINGTHECABLEJ
Toreplacethecable,proceedasdescribedinpoints5.2and5.3.
For the manual torch, it is necessary to make the connection R.
NOTE: The connection Rmust be carefully insulated.
5.5 REPLACINGTHEBUTTONT(manualtorch)
Remove the lever T1, unscrew the screws and open the grip.
Then unscrew the screw Sholding the cable terminal of the
button,cuttheconnectionR,removethebutton,insertthenew
buttonandperformtheabovestepsinreverseorder.Insulatethe
connection Rcarefully.
5.6 REPLACINGTHEGRIP(manualtorch)
The grip can be replaced by following the instructions given in
point 5.5.
5.7 REPLACING THE GRIP (torchfor useinautomatic mode)
The grip can be replaced by following the dismantling instruc-
tionsgiveninpoint5.2;removethegripandmountthenewone,
then follow the previous steps in reverse order to reassemble.
5.8 REPLACINGTHEDIFFUSORTUBEH
Unscrew the shield cup D, remove the tip Eand the diffusor F;
unscrew the electrode Gand then the tube H. Mount the new
diffusortubebyscrewingitonwiththe6-gaugewrenchprovided,
thenperform theabove stepsin reverseorder.
6 MAINTENANCEANDCHECKS
Before opening the machine, always disconnect the plug from
the mains.
Themotor-drivenfanonthemachineisthermostat-controlled,
and thus starts only when the generator needs to be cooled.
Incaseofrepairsinsidethemachine,makesurethattheswitch
Aisin"O"positionandthatthemainscableisdisconnectedfrom
thesocket.Thefannotturningdoesnotmeanthatthemachine
is OFF.
Anymaintenance mustbe performedonlyby qualifiedperson-
nel,awareoftherisksduetothehighvoltagesnecessaryinorder
for the device to operate.
Any operations requiring access to the inside of the machine
mustbe carriedoutonly afterunpluggingthe mainscablefrom
the electrical source.
It is important to keep the tip clean of metal waste. Do not use
sharpobjectstoavoiddeterioratingtheholeofthetip.Ifyouhave
troubleremovingtheelectrode,proceedasfollows:lubricatethe
threadingoftheelectrodewithpenetratinglubricatingfluid,then
unscrew the electrode. If the threading of the electrode holder
support on the torch assembly is damaged while removing the
electrode,tapitwithamaleM11afterfirstremovingthediffuser
tube H(fig. 8).
Topreventmetalresiduefromremaininginsidethetorchassem-
blyduringthisoperation,werecommendblowingintothetorch
withcompressedairwhiletapping.
Althoughthemachineisequippedwithanautomaticcondensa-
tiondrainagedevice,whichisstartedeachtimetheairsupplyis
cut off, it is a good habit to periodically make sure that there is
no trace of condensation in the tray N(fig. 2) of the reducer.
Accumulatedmetaldustmustbecleanedfromtheinsideofthe
machineperiodically,usingcompressed air.
6.1 PRECAUTIONSTOTAKEAFTER A REPAIR
After making repairs, take care to re-order the cables so that
thereissuretobeinsulationbetweentheprimaryandsecondary
sidesofthemachine.Makesurethatthewirescannotcomeinto
contact with moving parts or parts that heat during operation.
Replaceallclampsintheiroriginalpositionsonthemachine,to
prevent a connection between the primary and secondary cir-
cuits if a conductor accidentally breaks or disconnects.
Mount also the screws with the toothed washer in the original
position.
7 BASICSAFETYPRECAUTIONS
7.1 ELECTRICSHOCK
Electric shock cankill. Allelectricshocks are potentiallyfatal.
This plasmacutter requireshighvoltages forarcspark
starting(approx. 250÷300V). Thefollowingsafetyrules
mustbe thereforeobserved whenusing theunit:
• Do not touch live parts.
•Insulateyourselvesfromthepiecetobecutandfromearth by
wearinginsulatingglovesandclothing
•Keepyour clothing(gloves, shoes,hats,dresses)and bodydry
• Do not work in humid or wet areas
• Avoid touching or holding by hand the piece to be cut
•Always arrangefor aproperinsulation againstelectric shock.
Should you work close to or in a dangerous area use all
possibleprecautions.
• If you feel even the slightest electric shock sensation, stop
cutting at once. Do not use the machine until the problem is
identifiedandsolved.
• Always fit an automatic wall switch with adequate power, if
possible closeto themachine soasto immediatelyswitch the
unit off in an emergency event.
• Check often mains cable, torch cable, earth cable and torch.
Neverusetheunit when oneofthemisdamaged.Replacethem
immediately.
• Disconnect mains cable from mains before replacing cables
orbefore removingunit covers.
• Always switch the unit off or disconnect it before replacing
nozzle, swirl ring, electrode or nozzle holder.
• Do not use the unit without protecting covers.
•Alwaysreplaceanydamagedpartsoftheunit, torchandcables
withoriginalmaterial.
• Never remove torch or unit safety devices.